I noticed that in linux you can't make teams with the azerty keyboard. To fix it I have to set up, before launching the game, to the US keyboard. It is not the case in windows.
By watching the difference between qwerty and azerty, it is obvious:
http://en.wikipedia.org/wiki/Keyboard_layout#AZERTY Numbers need the shift. so when I do control+1 the game considers it as control+& ... so it doesn't make teams.
I think the way to fix it is to make users able to customise the keys to make teams and to call a team